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Segment Data Segment Data - Disaggregated Revenues, Segment (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Disaggregation of Revenue [Line Items]        
Revenues $ 235,329 $ 201,663 $ 698,884 $ 543,374
Operating segments | Mats and integrated services        
Disaggregation of Revenue [Line Items]        
Revenues 54,359 34,937 160,797 89,975
Operating segments | Mats and integrated services | Service revenues        
Disaggregation of Revenue [Line Items]        
Revenues 22,989 6,710 68,740 21,056
Operating segments | Mats and integrated services | Rental revenues        
Disaggregation of Revenue [Line Items]        
Revenues 19,911 14,736 59,661 45,098
Operating segments | Mats and integrated services | Product sales revenues        
Disaggregation of Revenue [Line Items]        
Revenues $ 11,459 $ 13,491 $ 32,396 $ 23,821